Summary
Origins
- Intertrochanteric line and medial lip of the linea aspera of the 🦴 femur
Insertions
- Quadriceps tendon to the patella and via the patellar ligament to the tibial tuberosity
Actions
- Extends the knee
- Stabilizes the patella medially
The vastus medialis forms the teardrop on the inner thigh. Its oblique distal fibers (VMO) pull the patella medially, balancing the lateral tug of the IT band while the broader proximal fibers contribute to knee extension.